Extensible lamp-shade



(No Model.)

y 2 sheets-sheet 1. W. S. BERG. EXTBNSIBLE LAMP SHADE.

No. 427,661. Patented May 13, 18910.

xs versus co., Pnofumo., wAsnmafcN, n. c.

(No Model.) 2 sheets-sheen 2. W. S. BERG. EXTENSIBLB LAMP SHADE.

Patented May 13, 1890.

UNITED STATES PATENT OFFICE.

IVALTER S. BERG, OF PHILADELPHIA, BENNSYLVANIA.

EXTENSIBLE LAMP-SHADE.

SPECIFICATION forming part of Letters Patent No. 427,661, dated May 13, 1890.

Application filed November 29, 1889. Serial No. 331,858. (No model.)

To all whom it may concern.'

Be it known that I, WALTER S. BERG, a cit-izen of the United States, residing at Phila'- delphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Extensible Lamp- Shades, of which the following is a specification.

My invention relates to extensible lampshades, and is an improvement on the devices for which Letters Patent were issued to me bearing date October 15, 1889, and November 19, 1889, numbered, respectively, 412,828 and 415,602.

My improvement consists in uniting and combining the several connections of the stretching devices, so that the operative parts can be moved to unfold and extend the shade and by reverse motion to fold it up compactly without dismembering or removal of any of the elements.

My present improvement is applicable to either form of construction shown in Letters Patent herein referred to.

Referring to the accompanying drawings, wherein like letters of reference point out similar parts on each ligure, Figure 1 represents in perspective a lamp-shade, portions of the fabric and ribs being broken away, showing the rib-supporting flanged ring slid down about midway of the supporting-rods- Fig. 2 is alike view showing said flanged ring locked eoncentrically within the top-notch collar in position for maintaining the ribs fully extended. Fig. 3 is a view, the covering fabric being omitted, of the form shown in Figs. 1 and 2, the flanged ring resting V downwardly upon the basering, whereby the orfshort guide-tubes e, through which the rods C are passed, so that it can be freely moved vertically upon said rods. The sliding ring can be ordinarily maintained at any desired elevation by frictional contact of the rods C and tubes e; but for securing the ring at given elevations a spring-detent e may be employed and be within the scope of my invention.

By reference to the drawings it will be seen that when the sliding ring E is provided with an outwardly-exten ding circumferential flange E and is projected upwardly its band will lie concentrically within the top-notch collar B, and being supplied with intermeshing locking devices e2 will be secured therein, the ribs a will be lifted up, and being sup ported by said iiange E the whole shade will be distended. Vhen, however, said ring E is moved downwardly onto the base-ring D, the shade will be compactly folded up (see Fig. 6) for storage or packing away. According to the point of elevation to which said sliding ring is brought to rest, it will have frictional contact with the ribs and they will be relatively spread and be maintained at any desired inclination in radial divergence from their connection with the top-notch ring.

From the above description, in connection with the drawings, the nature and practice of my invention will be fully understood by all familiar with analogous devices.

The main features of my improved shade are particularly described in the Letters Patent aforesaid. My present improvement consists in the provision of means whereby the shade can be distended or folded up without separating any of the operative elements, so that there will be no trouble in iitting ton gether disconnected parts and no risk of disadjustment by any portions being bent while the shade is removed or packed away.

Having thus fully described my invention and the manner of its operation, what I claim, and desire to secure by Letters Patent of the United States of America, isn

1. In a distensible Iampshade, the combination, with the top-notch collar B, the bascring D, the supportingrods C, permanently united at their upper ends to the topmotch cpllar and at their lower ends to the bascring, and the rings a, pivotally connected at TOO their upper ends to the collar B, of the ring E, mounted and adapted to be adj usted vertically upon said rods, and the circumferential flange E on said ring` in frietional contact with and adapted to fully distend and support the ribs d of the shade when the ring E is moved upwardly upon the rods within the top-notch collar B and to allow the compact folding of the ribs when said ring` is moved downwardly upon the rods and resting' upon the hase-ring D, substantially as described.

2. In a distensible lamp-shade, the combi-l d, pivotally connected at their upper ends to the collar of the ring E, mounted and adapted to be adj usted vertically upon said rods, said ring' being provided with circumferential flange E, in frictional Contact with and adapted to distend the ribs d when the ring is moved upwardly on the rods and to allow the compact folding` of said ribs when the ring is moved downwardly to rest upon the bascriug, the ring` E being provided with locking devices e2 to catch over the upper edge of the top-notch collar, in the manner and for the purpose set forth and described.

WALTER S. BERG. Vitnesses:

CHAS. B. KEEN, LAURA .K onnlvmsnv. 

